Service difficulty report · Support · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Support
Condition
Corroded
Location
Aft Cargo
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORROSION ON AFT CARGO BAY AFT LOWER BULKHEAD SUPPORT AT RBL 3 BS 947. / [01] VERIFIED APPLICABILITY OF SRM 51-10-02-0G-0;[02] NO ALLOWABLE DAMAGE LIMITS FOUND IN SRM FOR ACB AFT LOWER BULKHEAD SUPPORT; PART TO BE REPAIRED BY REPLACMENT PER SRM 51-10-02-0G-0;[03] VERIFIED CORRECTIVE ACTIONS 1-2. NO LIMITS IN SRM; PART TO BE REPLACED.;[04] LOCATED AND DRILLED HOLES IN NEW RECEIVED PART #149A8118U29 LOT# 1487879-1 PO# 863744 IAW SRM 51-40-05-0G-0 GENERAL - FASTENER HOLE SIZES AND DWG 149A8110 REV:-;[05] LOCATED AND DRILLED HOLES IN NEW RECEIVED PART #149A8118U29 LOT# 1487879-1 PO# 863744 IAW SRM 51-40-05-0G-0 GENERAL - FASTENER HOLE SIZES AND DWG 149A8110 REV:-<BR><BR>OK TO APPLY CHEMICAL CONVERSION AND PRIME BARE METAL;[06] VERIFIED UPDATED STATEMENT;[07] MEASUREMENTS;[08] MEASUREMENTS UPDATE;[09] VERIFIED CORRECTIVE ACTION ENTRIES 5-8. OK TO PRIME GIVEN.;[10] APPLIED CHEMICAL CONVERSION COATING; PRIME AND TOP COAT AT HOLES BARE METAL IAW AMM 51-21-41; AMM 51-21-72 AND AMM 51-21-73;[11] VERIFIED CORRECTIVE ACTION ENTRY 10. CARD COMPLETE.

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